Multiple Choice
RNA and DNA are classified as which type of organic compound?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
Which of the following could be a nucleotide of DNA?
A
Deoxyribose + phosphate group + thymine
B
Ribose + phosphate group + uracil
C
Deoxyribose + phosphate group + uracil
D
Deoxyribose + thymine (no phosphate group)
Verified step by step guidance1
Recall the basic structure of a nucleotide in DNA, which consists of three components: a sugar, a phosphate group, and a nitrogenous base.
Identify the sugar specific to DNA nucleotides, which is deoxyribose, as opposed to ribose found in RNA nucleotides.
Recognize the nitrogenous bases found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G). Uracil (U) is found only in RNA.
Confirm that a nucleotide must include a phosphate group attached to the sugar to form the backbone of the DNA strand.
Evaluate each option by checking if it contains deoxyribose, a phosphate group, and a DNA-specific base (thymine), which together form a valid DNA nucleotide.
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